Install Instructions

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Figure 25B: Alternate Multiple Boiler Water Piping w/Indirect Domestic Hot Water Heater (Page 2 of 2)
VI. Water Piping and Trim E. Multiple Boiler Installation (continued)
From Previous
Page
Unions *
Safety
Relief Valve *
Drain
Valve *
Full Port
Isolation
Valve *
Purge
Valve *
From Previous
Page
* Typical on all boiler loops
Consult table for
common pipe sizing
Field-installed low water cutoff(s).
Located within designated area:
- 12" max from side of boiler to vertical run of pipe
- 14" max below top of boiler
14" MAX
12" MAX
DHW
Circulator
Swing Check
Valve
Indirect Domestic
Water Heater
(IHW)
Optional
Full Port
Isolation
Valve *
Full Port
Isolation
Valve *
Boiler
Circulator *
Swing
Check
Valve *
Y-Strainer*
(Recommended)
Optional Full Port
Isolation Valve *
Tee and Plug *
(Recommended for future
Heat Exchanger service)
CAUTION
It is the installers responsibility to select pumps
and boiler piping congurations that provide the
proper ow rates and performance for the boiler
and indirect water heater.
Refer to Table 16 for recommended Boiler Loop
Circulator.